Description
In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: fix GPF in bitmap_get_stats() The commit message of commit 6ec1f0239485 ("md/md-bitmap: fix stats collection for external bitmaps") states: Remove the external bitmap check as the statistics should be available regardless of bitmap storage location. Return -EINVAL only for invalid bitmap with no storage (neither in superblock nor in external file). But, the code does not adhere to the above, as it does only check for a valid super-block for "internal" bitmaps. Hence, we observe: Oops: GPF, probably for non-canonical address 0x1cd66f1f40000028 RIP: 0010:bitmap_get_stats+0x45/0xd0 Call Trace: seq_read_iter+0x2b9/0x46a seq_read+0x12f/0x180 proc_reg_read+0x57/0xb0 vfs_read+0xf6/0x380 ksys_read+0x6d/0xf0 do_syscall_64+0x8c/0x1b0 entry_SYSCALL_64_after_hwframe+0x76/0x7e We fix this by checking the existence of a super-block for both the internal and external case.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
065f4b1cd41d03702426af44193894b925607073 to < a23b16ba3274961494f5ad236345d238364349ffaffected0b5390aeaa85eb2f15e0e2ea0731c0995285db5e to < 3d82a729530bd2110ba66e4a1f73461c776edec2affectedeeeba7f43ae27835718a5f5ad6552a8983e75201 to < 3e0542701b37aa25b025d8531583458e4f014c2eaffected6ec1f0239485028445d213d91cfee5242f3211ba to < a18f9b08c70e10ea3a897058fee8a4f3b4c146ecaffected6ec1f0239485028445d213d91cfee5242f3211ba to < c17fb542dbd1db745c9feac15617056506dd7195affected896a6fbefc9050cf940ed57947eda6dc23aa58b0affected6.1.135 to < 6.1.146affected6.6.88 to < 6.6.99affected6.12.25 to < 6.12.39affected6.14.4 to < 6.15affected
Linux Linux
Default version status: affected
6.15affected0 to < 6.15unaffected6.1.146 to ≤ 6.1.*unaffected6.6.99 to ≤ 6.6.*unaffected6.12.39 to ≤ 6.12.*unaffected6.15.7 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/a23b16ba3274961494f5ad236345d238364349ff ↗
- https://git.kernel.org/stable/c/3d82a729530bd2110ba66e4a1f73461c776edec2 ↗
- https://git.kernel.org/stable/c/3e0542701b37aa25b025d8531583458e4f014c2e ↗
- https://git.kernel.org/stable/c/a18f9b08c70e10ea3a897058fee8a4f3b4c146ec ↗
- https://git.kernel.org/stable/c/c17fb542dbd1db745c9feac15617056506dd7195 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗